Brush-making machine



May 20, 1930. T. L. STROUD BRUSH MAKING MACHINE Filed Sept. 14, 1928 2 Sheets-Sheet l May 20, 1930. T. STROUD I BRUSH MAKING MACHINE 2 Shee ts-Sheet 2 Filed Sept. 14, 1928 iw R QZQ dads.

. javnfin Patented May 20, 1930 v I UNITED. STATES PATENT..- OFFICE Y Application filed September 14, 1928. Serial No. 305,953..

This invention relates to the brush making Fig 8 is a view similar to Fig. 7, of a modiindustry, and more particularly to that part fied form of myinvention. of the industry which has to do with the mak- Fig. 9 is abottom view of the knot-picker ing of bristle brushes. V showing the receiving slots for pockets.

5 It is well known in the art that bristles Fig. 9 is a view showing tapered pockets. 55 taper throughout their length, being larger Fig- 1 i n n rg d w Of the entrance at the butt than at the free end. It is also 0 th b istle pocket. 7 well known thatthe bristles are not straight Fig- 11 is a view similar to Fig. of the but curved throughout their length. medifiedform of'my invention. 1

10 In making the best grade of bristle brushes gis a plan View showing a portion of for many different uses, it is necessary that 3 1) I theeet of m ving br stl s from the butts of all bristles be secured in the the knot-picker. I brush back, or around the brush handle, and gs etiOnal View of the parts that the bristlescurve in the proper direction wn In Fig. 12. I s Y 15 for the particular uses for which the brush is ig-. 4 s & planview Ofa clamp receiving made. the bristles from the clamp mentioned" in- The object of my invention is to produce a g- V device which will segregate the bristles in 1 g.,.l5 s.an end view of the parts shown knots or tufts of uniform size, with all the 111 g. i l T 20 butts at the same end and with the curvature Referring to the ir Wing like numerals of the bristles in the same direction. 9 f e designate sponding par s Another object is to produce a simple deh S l s vice that segregates the bristles and holds 1 Flgs. 2 and 3 f h r Wings ShOWa comth i h manner th t th may b dplete method of'segregating the bristles to be i i inserted in many styles of brush backs inserted in it brush back, I111- Another object is to provide a means for m e g t a hol'der'forlthelbristlesdelivering tufts or knots of bristles from a The holder cohslsts of a base hack 3 a lmotpicker and forming them into a continuend Walls The end Walls 4 are each P OHS m 1k vided with slots 5, and the top. and front of Another object is to produce a device that the hustle 9 f r open} I may be either manually or mechanically op- AS shown 1h Flgures 2 gr holder Grated 1s filled w th bristles, the butts of which rest In the drawings forming a part of these ee the front face 9 the baekrwall 70f ifi ti v s the holder. The base 2, of the holderalso Figure 1 is a plan view of my device inpoas eo t m p Wh the bristles sition to gather the bristles. khot'plcker h h of a ha? p Fig. 2 is a front view of the parts shown in Y f Wlth holes m the d for p p s Fig. hereinafter descrlbed. pi ss 0 Fig. 3 is a sectional View on the line 33 ..The 9 i 1s reqtangular inpross Sec? 0 of g 2. s V t 1on and s provided wlth a plural1ty of cy- 9 Fig. 4 is a cross section of the knot picker i p0Pkets extendmg through. with a tuft of bristles held therein. and adJacent to the bottom face or receiving side thereof. Entrance slots 9, in

F 5 shows a battery of knotpickers the receiving side of the bar communicate 9 45 stacked in position to form an ordinary with each of the o e brush. s v 'In the form, of'the pockets illustrated in F1g.shows the brlstles 1n position to be 1n- Fig, 11 of the drawings, the edges of the serted in the back of a brush entranceslots 9, are forced inward formin 1s a detail view oft. portion of the a l'iook flange l0, extending-the full (width to knot plckeri or the bases each side as the entrance slots. m

The operation of the knot-picker is as fol lows. The bar is reciprocated lengthwise over the bristles, being guided by the slots 5, in the ends 4, of the bristle holder. The reciprocation of the bar together with its weight centrally upon the bristles causes the sockets to fill and the bristles to roll or turn until all curve upwardly or in one direction and assume the position with respect to the bar, shown in Fig. 4, of the drawings. The openings 5, in the end walls 4, of the bristle holder which guide the bar 6, have sides parallel with the back wall of the holder, and as the butts of the bristles abut this back wall, the length of the butt end 14, of the bristlcs, projecting from the side of the knotpicker will always be the same.

Fig. 5 of the drawings show a stack of knot-picker bars containing bristles mounted upon a plate 11, provided with posts 12, which engage the holes 7, in the ends of the knot-picker bars. This is one method of accurately aligning the tufts of bristles to register with the bored brush back 13, shown in Fig. 6.

One method of securing the bristles in a brush back is to fill all the holes in the back with glue or cement before inserting the bristles as shown in Fig. 6.

Figures 12 to 15 inclusive show a method of removing the bristles from the knot-picker bar by means of a flat faced clamp 15. The bristles are removed from the clamp 15 by a clamp 16 which changes the formation from knots or tufts to a continuous mass line with the butts of the bristles exposed when finally held by clamp 16. When so held the line of bristles are in position to be secured in a continuous U shaped metal clamping strip for fastening. in or on various kinds of brush backs or rollers. Also when held by clamp 16 the bristles are in position to be dipped in rubber cement or the like. For making paint brushes the mass line of bristles which is held together with dried rubber cement is wrapped around the handle and the natural curvature having been held in one direction assumes the proper pitch, that is, all the bristlescurve toward the center of the brush.

For handling hog bristles or other tapering stock the knotpicker pockets are preferably made with, a slight corresponding taper as shown at 8 in Figure 9.

As will be seen the knotpicker bars segregates thebristles and releasably holds them in the pockets and that stacking or asseme blling the bars closes or covers the pocket s ots.

Having thus described my invention what I claim is: V

1. In a bristle segregating device, a bar, pockets extending transversely of the bar and spaced along the length thereof, slots extending, transversely of the bar communicating with said pockets, both of the transverse edges on each side of the slots terminating in hooks facing one another.

2. In a bristle segregating device, a bar, pockets extending transversely of the bar and spaced along the length thereof, slots THOMAS L. STROUD. 

